蒲河流域河流生境质量综合评价及其与水质响应关系

River habitat quality assessment,water quality analysis and their response relation of Puhe River Basin

河流生境是河流生物赖以生存的环境,是维持河流生态完整性、维护河流健康的重要因素。本文结合蒲河流域环境特点,运用层次分析法建立了蒲河流域河流生境质量评价体系,对流域内25个河段的生境质量状况进行了综合评价,并进一步分析了河流生境综合评价指数与河流水质的相关关系。结果表明:(1)蒲河流域25个河段的生境质量状况差异显著,其中1个河段的生境质量等级为好,5个河段为较好等级,16个河段为一般等级,3个河段为较差等级。(2)生境综合评价指数与TP、NH4+-N、CODCr呈负相关,生境质量评价体系中其他指标也与水质指标具有相关性,表明生境质量是影响水质的重要因素。

River habitat is an important factor to maintain ecological integrity and river health.According to environmental characteristics of Puhe River Basin, a comprehensive river habitat as-sessment index system was established by using analytic hierarchy process. Habitat quality statusof 25 sections of Puhe River Basin was evaluated. Correlation between the habitat quality indica-tors and water quality parameters were further evaluated. The results showed that ： （ 1 ） Significantdifferences in habitat quality were found among the different sections. One section achieved thepreferable level, 5 good, 16 fair, and 3 poor; （2） The comprehensive river habitat assessmentindex was negatively correlated with TP, NH4＋-N, CODc~, and other habitat quality indices werealso correlated with the water quality index. It was indicated that habitat quality was a major fac-tor impacting the water quality.